Microchip Technology HCS410-I/SN

The HCS410 supports remote keyless-entry transmissions and a batteryless low-frequency transponder mode. Its encoder transmission contains a 32-bit encrypted hopping portion and a 37-bit fixed portion. The transponder provides a bidirectional challenge-response exchange using one of two programmed encryption keys. A complete design needs compatible external RF and low-frequency interfaces, key provisioning, and receiver learning.

The I/SN order code identifies the industrial-temperature 8-lead plastic SOIC, nominal 150 mil body. The registered site package is 8-SOIC, matching the catalog's 0.154-inch width designation. Confirm the manufacturer's mechanical drawing, land pattern, and pin-1 orientation before layout.

Layout checks

• Orient the SOIC using the datasheet top-view pin diagram.
• Keep the LC0/LC1 transponder network consistent with the recommended design.
• Provide local VDD decoupling and verify switch and data connections.

The registered package and local JPG were checked. This illustration is not a dimensional drawing.

Microchip DS40158F 8-lead SOIC top-view pin assignment:

Check multiplexed pin behavior and application circuitry before schematic release.

Mode-dependent characteristics require the appropriate configuration and external circuit.

Other HCS encoders are not automatically interchangeable with the HCS410. Compare the transponder interface, key and seed provisioning, challenge-response protocol, encoder word, pin functions, package, and temperature grade. HCS410T-I/SN is a separate tape-and-reel order code; confirm purchasing and assembly requirements before substitution. No unverified internal product link is provided.

Microchip Technology documents the HCS410 in datasheet DS40158F, including encoder operation, transponder challenge-response, electrical conditions, SOIC pinout, and product identification. The ordering table defines I as −40 to +85 °C and SN as the 8-lead plastic SOIC package.

Verify the full HCS410-I/SN marking and package against traceable procurement records. Program encryption keys, serial identity, seed, and configuration through an authorized process; confirm the receiver and transponder reader recognize the resulting device behavior.

Secure key handling and receiver synchronization are essential to code-hopping operation. Validate the LF coil, challenge-response mode, switch multiplexing, output format, programming procedure, electrical limits, and complete RF and transponder links against DS40158F before release.